def extend_properties(self, category):
"""Extend the category's properties per the inheritance rules."""
positive = set(category.positive_properties)
negative = set(category.negative_properties)
more = True
while more:
more = False
for rule in self._property_inheritance_rules:
new = rule(category.name, positive, negative)
if new:
new_positive, new_negative = new
new_positive -= positive
new_negative -= negative
if new_positive or new_negative:
more = True
positive |= new_positive
negative |= new_negative
negative -= positive
return categorization.Category(category.name, positive, negative)
def __str__(self) -> str:
return str(
categorization.Category('last_term', self._positive_properties,
self._negative_properties))
def __str__(self) -> str:
return str(categorization.Category('compound', self._positive_properties,
self._negative_properties))